package com.navinfo.platform.aero.data.rest.core.filter;

import org.springframework.core.Ordered;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Component;

import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * @date 2018-12-11
 */
@Component
@Order(Ordered.HIGHEST_PRECEDENCE)
public class SimpleCORSFilter implements Filter {

    public SimpleCORSFilter(){
    }

    @Override
    public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain)throws IOException,ServletException {
        HttpServletResponse response =(HttpServletResponse )res;
        HttpServletRequest request =(HttpServletRequest)req;
        response.setHeader("Access-Control-Allow-Origin","*");
        response.setHeader("Access-Control-Allow-Methods","POST,GET,OPTIONS,DELETE");
        response.setHeader("Access-Control-Max-Age","3600");
        response.setHeader("Access-Control-Allow-Headers","Authorization, Origin, X-Requested-With, Content-Type, Accept");

        if("OPTIONS".equalsIgnoreCase(request.getMethod())){
            response.setStatus(HttpServletResponse.SC_OK);
        } else {
            chain.doFilter(req,res);
        }
    }

    @Override
    public void init(FilterConfig filterConfig){
    }

    @Override
    public void destroy(){
    }
}